Method for treating circuit board for use in disk recorder or player apparatus

Abstract

A circuit board is mounted in a cabinet in which a disk is housed. A treatment for preliminarily releasing ammonia possibly causing fogging of the disk from the circuit board is performed by allowing the circuit board to stand at 70° C. outside the cabinet for 24 hours before the circuit board is mounted in the cabinet.

1. A method for treating a circuit board to be mounted in a cabinet of a disk recorder or player apparatus in which a disk is housed, for releasing from the circuit board a substance possibly causing fogging of the disk by a chemical reaction at a high temperature, the method comprising the step of allowing the circuit board to stand in a predetermined high temperature environment outside the cabinet for a predetermined period of time before the circuit board is mounted in the cabinet to preliminarily release the substance possibly causing the fogging of the disk from the circuit board. 
   
   
     2. A method as set forth in  claim 1 , wherein the substance possibly causing the fogging of the disk is ammonia. 
   
   
     3. A method as set forth in  claim 1 , wherein the predetermined high temperature environment in which the circuit board is allowed to stand before the circuit board is mounted in the cabinet is kept at a temperature which is not higher than an operation guarantee temperature of the disk recorder or player apparatus.